METHOD FOR PREPARING METAL-FREE PHTHALOCYANINE

摘要

FIELD: chemical technology. ^ SUBSTANCE: invention relates to a method for synthesis of metal-free phthalocyanine having important and broad practical using. Invention describes a method for synthesis of metal-free phthalocyanine by high-temperature condensation of 3-nitro-5-tert.-butylphthalodinitrile in the presence of lead oxide taken in the amount 0.25-0.27 g, ammonium chloride taken in the amount 0.3-0.33 g and ammonium molybdate taken in the amount 0.02-0.025/1 g of 3-nitro-5-tert.-butylphthalodinitrile at temperature 240-260°C. Invention provides preparing metal-free tetra-(3-nitro-5-tert.-butyl)phthalocyanine with the yield 5% by the simple a single-step technology. ^ EFFECT: improved method of synthesis. ^ 2 ex